On Wednesday a high-speed train crashed and derailed in Santiago de Compostela, killing at least 78 people in Spain's worst train crash since 1972. The speed of the train is being questioned and the veteran driver was arrested. The train was full of passengers traveling to attend a prominent festival, which was subsequently canceled due to the tragedy.-Leanne Burden Seidel (19 photos total)

A fireman carries a wounded victim from the wreckage of a train crash near Santiago de Compostela, northwestern Spain, July 24. A train derailed outside the ancient northwestern Spanish city of Santiago de Compostela on Wednesday evening, killing at least 78 people and injuring up to 131 in one of Europe's worst rail disasters. (Monica Ferreiros/La Voz de Galicia via Reuters)

A firefighter works inside a derailed carriage at the site of a train accident in Santiago de Compostela, Spain, July 25. A Spanish train that hurtled off the rails and smashed into a security wall as it rounded a bend was going so fast that carriages tumbled off the tracks like dominos.(Lalo Villar/Associated Press) #

The train driver Francisco Jose Garzon Amo, is helped by a policeman after a train crashed near Santiago de Compostela, Spain, July 24. Spanish police on July 26 detained the driver and took possession of the "black box" of the train expected to shed light on why it was going faster than the speed limit on the curve where it derailed. (Oscar Corral/Reuters) #

An injured man sits next to the body of a victim following a train accident near the city of Santiago de Compostela. A train hurtled off the tracks on July 24 in northwest Spain killing at least 78 passengers and injuring more than 140. (Monica Ferreiros/La Voz de Galicia via AFP/Getty Images)#

Relatives of the victims involved in Wednesday's train accident react at a victims information point in Santiago de Compostela, Spain, on July 25. Relatives of victims from a train crash in northwestern Spain sobbed and hugged each other Thursday near a makeshift morgue in a sports arena for the victims as the death toll rose to 78 and investigators tried to determine the cause.(Salome Montes/Associated Press) #

Pilgrims and tourists place flowers, candles and notes at the facade of the famous Santiago de Compostela Cathedral, northwestern Spain, July 26 to pay tribute to the victims of the train accident on 24 July.(Lavandeira Jr./EPA) #

Staff from the Hospital Clinico de Santiago de Compostela observe a minute of silence for victims of a train crash in northwestern Spain, July 26. The driver of a Spanish train that derailed, killing at least 78 people, was under police guard in the hospital on Friday after the accident, which an official source said was caused by excessive speed.(Vincent West/Reuters) #

A man looks on from a cafe as a poster with a black ribbon on is displayed on the window in memory of the victims of the train crash , on July 26, in Santiago de Compostela, Spain. (David Ramos/Getty Images) #